Physics – Condensed Matter
Scientific paper
1995-08-18
Physics
Condensed Matter
23 pages, REVTEX 3.0, epsf.tex, 7 eps figures. Review article for proceedings of STATPHYS 19; added new reference
Scientific paper
We study the finite temperature crossovers in the vicinity of a zero temperature quantum phase transition. The universal crossover functions are observables of a continuum quantum field theory. Particular attention is focussed on the high temperature limit of the continuum field theory, the so-called ``quantum-critical'' region. Basic features of crossovers are illustrated by a simple solvable model of dilute spinless fermions, and a partially solvable model of dilute bosons. The low frequency relaxational behavior of the quantum-critical region is displayed in the solution of the transverse-field Ising model. The insights from these simple models lead to a fairly complete understanding of the system of primary interest: the two-dimensional quantum rotor model, whose phase transition is expected to be in the same universality class as those in antiferromagnetic Heisenberg spin models. Recent work on the experimental implications of these results for the cuprate compounds is briefly reviewed.
No associations
LandOfFree
Quantum phase transitions in spins systems and the high temperature limit of continuum quantum field theories does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantum phase transitions in spins systems and the high temperature limit of continuum quantum field theories, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum phase transitions in spins systems and the high temperature limit of continuum quantum field theories will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-271548